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// license:???
// copyright-holders:???
/***************************************************************************
fixfreq.h
Fixed frequency monochrome monitor emulation
The driver is intended for drivers which provide an analog video signal.
VSYNC and HSYNC levels are used to create the bitmap.
***************************************************************************/
#ifndef FIXFREQ_H
#define FIXFREQ_H
#include "emu.h"
#include "machine/netlist.h"
#define FIXFREQ_INTERFACE(name) \
const fixedfreq_interface (name) =
#define MCFG_FIXFREQ_ADD(_tag, _screen_tag) \
MCFG_SCREEN_ADD(_screen_tag, RASTER) \
MCFG_SCREEN_RAW_PARAMS(13500000, 858, 0, 858, 525, 0, 525) \
MCFG_SCREEN_UPDATE_DEVICE(_tag, fixedfreq_device, screen_update) \
MCFG_DEVICE_ADD(_tag, FIXFREQ, 0) \
MCFG_VIDEO_SET_SCREEN(_screen_tag)
#define MCFG_FIXFREQ_MONITOR_CLOCK(_clock) \
fixedfreq_device::set_minitor_clock(*device, _clock);
#define MCFG_FIXFREQ_HORZ_PARAMS(_visible, _frontporch, _sync, _backporch) \
fixedfreq_device::set_horz_params(*device, _visible, _frontporch, _sync, _backporch);
#define MCFG_FIXFREQ_VERT_PARAMS(_visible, _frontporch, _sync, _backporch) \
fixedfreq_device::set_vert_params(*device, _visible, _frontporch, _sync, _backporch);
#define MCFG_FIXFREQ_FIELDCOUNT(_count) \
fixedfreq_device::set_fieldcount(*device, _count);
#define MCFG_FIXFREQ_SYNC_THRESHOLD(_threshold) \
fixedfreq_device::set_threshold(*device, _threshold);
#define MCFG_FIXFREQ_GAIN(_gain) \
fixedfreq_device::set_gain(*device, _gain);
// pre-defined configurations
//ModeLine "720x480@30i" 13.5 720 736 799 858 480 486 492 525 interlace -hsync -vsync
#define MCFG_FIXFREQ_MODE_NTSC720 \
MCFG_FIXFREQ_MONITOR_CLOCK(13500000) \
MCFG_FIXFREQ_HORZ_PARAMS(720, 736, 799, 858) \
MCFG_FIXFREQ_VERT_PARAMS(480, 486, 492, 525) \
MCFG_FIXFREQ_FIELDCOUNT(2) \
MCFG_FIXFREQ_SYNC_THRESHOLD(0.3)
//ModeLine "704x480@30i" 13.5 704 728 791 858 480 486 492 525
#define MCFG_FIXFREQ_MODE_NTSC704 \
MCFG_FIXFREQ_MONITOR_CLOCK(13500000) \
MCFG_FIXFREQ_HORZ_PARAMS(704, 728, 791, 858) \
MCFG_FIXFREQ_VERT_PARAMS(480, 486, 492, 525) \
MCFG_FIXFREQ_FIELDCOUNT(2) \
MCFG_FIXFREQ_SYNC_THRESHOLD(0.3)
// ======================> vga_device
class fixedfreq_device : public device_t,
public device_video_interface
{
public:
// construction/destruction
fixedfreq_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
fixedfreq_device(const machine_config &mconfig, device_type type, const char *name, const char *tag, device_t *owner, UINT32 clock, const char *shortname, const char *source);
// inline configuration helpers
static void set_minitor_clock(device_t &device, UINT32 clock) { downcast<fixedfreq_device &>(device).m_monitor_clock = clock; }
static void set_fieldcount(device_t &device, int count) { downcast<fixedfreq_device &>(device).m_fieldcount = count; }
static void set_threshold(device_t &device, double threshold) { downcast<fixedfreq_device &>(device).m_sync_threshold = threshold; }
static void set_gain(device_t &device, double gain) { downcast<fixedfreq_device &>(device).m_gain = gain; }
static void set_horz_params(device_t &device, int visible, int frontporch, int sync, int backporch)
{
fixedfreq_device &dev = downcast<fixedfreq_device &>(device);
dev.m_hvisible = visible;
dev.m_hfrontporch = frontporch;
dev.m_hsync = sync;
dev.m_hbackporch = backporch;
}
static void set_vert_params(device_t &device, int visible, int frontporch, int sync, int backporch)
{
fixedfreq_device &dev = downcast<fixedfreq_device &>(device);
dev.m_vvisible = visible;
dev.m_vfrontporch = frontporch;
dev.m_vsync = sync;
dev.m_vbackporch = backporch;
}
virtual UINT32 screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect);
NETDEV_ANALOG_CALLBACK_MEMBER(update_vid);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_post_load();
//virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
void recompute_parameters(bool postload);
void update_screen_parameters(const attotime &refresh);
private:
int sync_separator(const attotime &time, double newval);
int m_htotal;
int m_vtotal;
double m_vid;
int m_last_x;
int m_last_y;
attotime m_last_time;
attotime m_line_time;
attotime m_last_hsync_time;
attotime m_last_vsync_time;
attotime m_refresh;
attotime m_clock_period;
bitmap_rgb32 *m_bitmap[2];
int m_cur_bm;
/* adjustable by drivers */
UINT32 m_monitor_clock;
int m_hvisible;
int m_hfrontporch;
int m_hsync;
int m_hbackporch;
int m_vvisible;
int m_vfrontporch;
int m_vsync;
int m_vbackporch;
int m_fieldcount;
double m_sync_threshold;
double m_gain;
/* sync separator */
double m_vint;
double m_int_trig;
double m_mult;
int m_sig_vsync;
int m_sig_composite;
int m_sig_field;
protected:
};
// device type definition
extern const device_type FIXFREQ;
#endif /* FIXFREQ_H */
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